Apparatus for preparing ceramic articles



Jan. 23, 1934.4 w. LENGERsDoRFF ET AL 1&944795 APPARATUS FOR PREPARING CE'RfVMIC ARTICLES vFiled May 51. 1929 Y) ersav 777. ngerscfa vento/3: m?

Patented Jan.`23, 1934 i 1,944,796

APPARATUS FOR PREPARING CERAMIC ARTICLES Willy Lengersdorff and Max Lengersdorff, Bunzlau, Germany Application May 31, 1929, Serial No. 367,450, and in Germany February 9, 1928 1 Claim. (Cl. 25-2) The subject of the present invention forms a nal section through the apparatus after removing process for the mechanical manufacture of cethe'insulating hoods or covers. ramic articles. In accordance with the present invention the The new and essential feature consists in the work from the molding machine to the entrance 5 fact that the articles are shaped, polished, grooved to the oven is completely eiected on one work 60 and dried on a moving band without changing of table and so that the articles are not subjected position, so that any handling for local moving to anyr movement in relation to the work table. of the articles is avoided. For this purpose a work table is arranged di-` It has already been proposed in the ceramic rectly on to the molding machine. This consists industry to spread the ceramic masses on a forof a frame a with rollers b. The rollers b rotate 65 warding band and to move it forward. It has in bearings c. Near the upper edges of the rollalso been proposed, to arrange casting moulds on ers, guide' plates d are arranged. Between these a band and to inove this forward under a pourin guide plates on the rollers b lie the carrying apparatus. boards e, on which the separate moulded arti- The present invention on the other hand, concles f rest. Underneath the rollers b is mount- 70 templates avoiding the otherwise unavoidable ed the heating tube g. At those places at which frequent moving about of the articles between the no worllng ordcontrolling of the articles is nectime when they are shaped and fired. This reessary, e gui e pla es d carry an asbestos cover peated moving about means not only considerably h in order to concentrate the heat. A tube put increased work, but also an extraordinary detedown on the carrying boards e of the work table 75 rioration of the nished product, and consequentcan easily be moved forward by hand or by me- 15;*r the present1 continuous forward moving band chaiical nelans. The b'leadth of the tble deo ers not ony a cheapening of manufacture, pen s on e ar icles, t e length on t e days but also a lessening of waste and simultaneousproduction or the length of the drying process. 1y a considerable increase in the quality of the The carrying boards e can also be provided with 30 nished product. a disk i in the manner of a potters lathe.

When the tubes, which in the drying room stand If, for example, tubes are to be produced, the in pile` otlOO to 200 articles, rtfzeive during drytuedmolled by the iigdnfg mainline anrl proing a ra of air on one side, is side dries previ e wi grooves is i e rom e mac ine in maturely and the tubes become curved. Consesuci a manner that it rests with its pointed end 85 quently, with the present day methods of dry 0n he so-called base board e. The base board ing, the articles must be changed several times with the tube is now removed from the molding and so that thestraight tubes come to rest in the machinerect 0n t0 the beginning 0f the WOIk middle of the pile, whilst in the outer rows of table. T e formed tube is now molded again and the pile the curved, already dried articles must InOVeS f0IWaI d with its base bOard 0n the WOrk 90 be arranged with the curved parts outwards. The' gable Sg Shag 1t lhalltmatllaltlybpushed Ole Steg result of this method of manufacture is that per- OTWar y W en e' secon 11 e, presse i an https, the articles Curved through drying wm otherwisetreated moves into the position of the 40 draw out in the right direction, but perhaps will mst Oneg5 curve out towards a Second Side- The formed articles move, through the con- Not only the repeated changing, but also pap tinual pushing, over the rollers of the work ticularly the forwarding of the articles to the table until they arrv? at the oven The heatingoven gives rise to great waste. Further, with the 2f the Work tabll prtlcularly tlelet msqlailof working method in piles in use up to the present, tf1 gwaln exe. en .vn Ipl drym :gt or? 100 the outer articles are accessible to observation, d an'g e110 gs artigli dpl e c ange an ere y y on tle ottillierbhanbd the ube Carrantgetllii the dinside 'The heat insulation h, can also be formed as a can ar 3,' e o serve an con ro e an elven drying arrangement in accordance with the when a mistake has been observed the changing known damp systemof Positl'on Qf the fajulty artlcle 1s so extrafrdf As afurther sphere of application the prepara- 105 narily diflicult, that in normal factory practice it tion of sanitary articles, Such as closet basins iS not .donewash basins, and particularly baths, can be men- Flglne 1 1S a OIOSS-SetlOn hlOugh the aDPationed. Here it is immaterial whether the mouldratuS fOr the present process. ing is done by pouring or by hand. The whole Figure 2 shows diagrammatically a longitudiprocess from the moulding to the entry into the 110 oven, including the glazing of the crude articles occurs on the work table.

The possibility of controlling each article as well by the workman as by the overseer is of the greatest importance. seer forces the worker to prepare the articles particularly carefully. Any deformations or formation of cracks can no longer be excused, but

become in fact immediately apparent.

Even with deficient execution it is now possible to preserve from crookedness and cracks articles, which perhaps dry on one side, by timely laying on of damp cloths, in the known manner.

The present production process enables all Working and drying faults to be removed at the instant they occur.

The control by the over' We claim:-

Apparatus for continuously manufacturing ceramic articles, comprising a Work table including roller members, forming a continuous path having supporting boards for the molded articles,

Which path is adapted to convey the articles dur- 

